Glass-drawing apparatus.



L. MAMBOURG & U. HOUZE. GLASS DRAWING APPARATUS.

. APPLICATION FILED MAR.25,1909. Patented July 26, 1910.

2 SHEETS-SHEET 1.

Witnesses i Inventors MM@. wsm mam...

Attorney L. MAMBOURG & U. HOUZE.

GLASS DRAWING APPARATUS.

965,205 APPLICATION FILED MAR.25,1909. Patented 26 2 SHEETS-SHEET 2.

w E) M.

Attorney MMW .; "I hiioroth 'mmse mmn inneii'ssn riooih, or Moniq'r mnifon, hzaxo To 'all whom-it mag "concern? Be 'it known that We, LEOPOLD MAMBOURG andULoissn Honz'n, citizens of the United states, residing at Mount Vernon, Knox 5 county, Ohio, have invented certain 'new'and useful Improvements in Glass-Drawing Apparatns, ofwhich-the-tollowing is aspeci- Kfication! This invention,relating to glass-drawing apparatus, will be readily understood from the following, description taken in- COIH1( 3- *tion-with the'accompanying drawings in WlllCh2' Figurelis a verticalsection of a glassdrawmg apparatus embodying our inventiODI'Flg. 2 a vertical section of the bait, upon an enlargedscale: Fig. 3 a plan of the pot-fnrnace with some of the cover-plates removed, the furnacefa'nd pot being shown in conjn'nction with aportion of the tank, which latter appears in'horizontal'section: and Fig. 4 a vertical section, on; an enlarged 1', fscale, of the joint between two cover-plates.

' {In the drawings :-1 indicates the pot-fore ze'j nace, preferably circular: 2,. its wall: 3,

doorsinrthe' front of the fnrnace, these doors extending to the top of the Walli t, the pot, circular in plan and very shallow, the pot being dispo-sed'centrally within the furnace and with its top substantially even with the 6, the tank, presentin no pecnliaritiesso far as the present app ica'tion is concerned: 7, the glass in the tank: 8, a conduit leading from an outletin the tank to an inlet disposed centrally in the floor of they pot, this conduit being formed in a neck formed with and projecting from the pot to the outlet of the tank: 9, a pier projecting upward from the floor of the furnace and engaging i fn nder the" conduit and giving support to the general central portion ofthe pot: 10, a'pair of piers extending upward from the'floor of the furnace and engaging under the fioor charging into the" upper} portion ofthe "13, 'circ'urnf rential "series of se plates, preferably Wall of the 'fnr'n c pot and cov"" h e Ass-DnAwme ArrAnarns:

Speciflcatihn of ere Eatent. Application filed March 25, 1 909. 7 Serial H m-485,649, ff-

- furnace below the plate 15:"17, 'gas buhersl 1 tained at that level{while ivithdraviialsTo glass-dratving operation. 2; 22 3" top of the furnacei 5, the floor of the pot:

of the pot and giving "the main support to the pot, these'pie'rsdO being formed by a pair of parallel Walls freely straddling the neck of the poti 11;gas' "burners fof'lieatin'gf the furnace 12, fiue ionc rr ingthe waste: gases-from thej fiirnacje, and "Shawnee dis-j y Th o d avi g-ten ew -ed shame i fb itd ns nt gi aetaaatl he, ate

them, these platesfhahngfthmr; adjoining edges tongued and grooved as"ih;-

dicated in Fig. 4, the inner extrem'itiesof "these:- plates resting on a rabbet in {the 'top,"

of thepotwall :l hawide notch. exjtending'eo through the inner membergrofthe rabbet off i T the pot-wallet one point inthe circumference of the pot, preferablyzat the frontofthe po W 15, a special one'ofthe top-plate'sfits',i rrie extremity being adapted to fill"the, noch"'e5 v14 16,:a discharge port in 'thei floor of the ,r

arranged to supply heat at thej base" of the f furnace;at-thisportz' 18', an. annular ridge",. *projeotingnpwardlyfrom the floor of the "to pot'around the inlet thereto: l9,theglas s in U the-pot, its top standing at 't he'san eilevel as the glass 7 in the tank and';being "niaihf If glass fl roni the pot'are taking fpla 2 closed hood of circular 'forrnjdisp the pot and concentric therevvith'andh ing a diameter nearly equaling the interior f Q the pot: 21, an elevating hl'ow lpipe-lcoiinectt ed with the hood and extendinghpvvardl1180 therefrom and adapted to serve for'the a a "mission of the airemployed inthelolowingj f' i and adapted to "serve also as -tlie ne'ans "hyi Which-the hood can he elevated dnring thelf! 'letallicfiring fifi sec'nredto the base of. the hood and forniing a bait projecting below the'inargin 'jf 'the'f hood and adapted to enter. the mot prettvllt, close to andconcentricvvith the vvvlall of the 5,1

pot: 23, an annular recessin thetop ko f the 0 bait ring, this recess;extendingripiettylvvell down into the ring; 9A, an anniilarrilngff g burner disposed over the bait 'irin'g-and adapted to direct its flamesdownwardlyfto 'the recess 23 in the bait ring: and 5 25,,the

glass cylinder being drawn] I y Inthe operationf ofjthis apparatus the}! glass in proper condition in thejtankiis niainff tained at the same'level infthe otena e lowering of the temperature of the glass in fthe pot is prevented-by the tea-tee, the flip tna'ce'. Thehood withitsbaitis to b -'andlowered tyehy suitab the 1aw pipe;e1 ;,is t" b a1 source of ,se pl e th ze lenta t teesed- -for the forming of the glass of the cylinder into sheet glass.

It is found in practice that as the bait and thevupper end of the cylinder rise from the pot they get comparatively colder until the forming cylinder is supported by hard glass joining metal, the local conditions at the juncture being such that fracture is quite apt to occur. In the present arrangementthe bait is. maintained at such heat as to. revent this, the juncture between the top 0 .the cylinder and the bait being, not necessarily of plastic glass, butat least of glass in such temperature condition as to insure against special brittleness. The ring gas burner 24 is the preferred means for maintaining the juncture between the glass and the bait at satisfactory temperature, but this particular heating means is merely ty ical, the

' recess 23 in the upper portion 0 the bait ring permits of special accessibility of the heat of the lower portion of the bait-ring where the heat is most wanted.

-Taking the condition of things as they appear in Fig. 1, it is to be understood that glass reaching thev pot has of course a tendency toward self-cooling. This tendency must be overcome-by the heat derived by the pot from the furnace. This heat is all necessarily transmitted through the walls and floor of the pot and we have found that a deep body of glass in a pot is subject to very considerable local differences in its temr perature, that glass contiguous to portions of the pot wall being much the hottest. It is for this reason that we so proportionthe bait and pot that the glass drawn from it will be the glass close to the pot-wall.

While it is true that the glass closest to I the pot-wall is at the highest temperature of any of the glass exposing its-surface in the pot it would also be unfortunately true that the lass inwardly away from the pot-wall won (1 be at ossibly a considerable lower temperature, tihus bringing about the result that the pot-glass exterior to the drawing cylinder and the glass interior to that cylinder might be at materially different temperatures. In order to avoid as far as practicable serious differences in temperature of the glass in the pot we make the pot extremely shallow so that all the glass in the pot is pretty close to the floor of the pot, and we provide the upwardly extending annular ridge l'fl'in order that heat-conveying substance of the pot mayreach up inwardly into the body of glass interior to the drawing cylinder thus very much tending to lessen a condition of difference 111 temperature of the glass at the interior and exterior of the cylinder.

When a cylinder has been drawn and sev- 'ered from the glass in the pot, there remains a residue which floats upon the surfaceof the glass in the pot and impairs its quality for the next drawing. In some cases we place a cover temporarily over the pot and, through it, we direct the flames of gas burners upon this glass until it is at the proper temperature. Our preference is to withdraw outwardly the plate 15 leaving the notch 14 open, this notch extending below the level of the glass in the pot. The undesired glass floating on the top of the glass in the pot may then be skimmed off and allowed to drop into the furnace and out through the port 16, leaving the pot charged .with glass which has not been subjected to cooling in the operation of drawing. If the glass thus skimmed from the pot and dropped to the port 16 takes on any such thick condition that it will not discharge through the port readily, it may be brought to the proper flowing condition by the action of gas burner 17. The floor of the furnace may, as a general thing, be depended upon to reduce the glass to condition to permit it to How out through the port, but the gas burners 17 serve .in facilitating the process." In addition to dealing with the residue left upon the glass in' the 'potas aresultof the previous drawing, it

may occur that, owing to delay in getting a bait to the glass fora new drawing, the

surface of the glass has become somewhat chilled.v Inthat case a cover-plate may be laid upon the wall of the ,pot and a gas burner may be directed upon the glass I through the slot 14, the presence of which slot manifestly avoids the necessity for burner-openings in the cover-plate. The construction of these pots, or rather the maintenance of them in use, has developed avast deal of trouble, the costly pots breaking most unexpectedly, the breakage being due, to some extent, to improper manner of support, but mainly to the differential expansion due to the very considerable thickness and vertical extent of the wallof the pot. In the'present construction all portions of the pot are comparatively thin and the wall, it will be observed, has very little height; In addition to this the structure becomes much lightened.

The support of the pot is gotten mainly from the two pier-walls 10 which straddle the conduit neck anti give the two side portions of thepot a good support, while the central pier 9gives support to the central portion of the pot and to the conduit neck.

When a pot becomes ruined, by use or breakage, a new one could of course be subplates and lifting out the o'ldpot and sub% istituting the new one. But our preference is to remove the old pot and place the new one bya horizontal movement. We remove the se mental plates and then open the doors g then pull the damaged pot outwardly in a horizontal direction, and substitute the new one in anobvious mannerL The doors' 3 open wide enough to permit this horizontal movement of the pots. When such operation is being performed it is obvious that the glass from the tank must be shut ofi, but this matteris taken care of by the shutoff devices with which the tank should beprovided. 7 i

The description which we have given of the operation of the apparatus assumes the successful drawing of. a cylinder and the centering of the cylinder from the glass in the pot. In case a cylinder breaks While being drawn, as may occur with more or less frequency, some of the glass from the cylinder will fall into the pot, a portion of it sinking and a portion of it floating. The

glass thus reaching the top of the glass in the pot may be treated the same as the residue from a perfectly drawn cylinder.

lVe claim a 1. Glass-drawing apparatus comprising, a shallow pot adapted to contain the glass to be drawn and having a symmetrically disposed opening in its floor, a conduit-neck leading from said opening and adapted to convey glass thereto from a tank, and a furnace arranged to apply heat to the exterior of the pot, the floor of said pot being provided with an elevated annular ridge,

combined substantially as set forth? 7 2. Glass-drawing apparatus comprising, a shallow pot adapted to contain the glass to be drawn and having a symmetrically disposed opening in its .fioor, a conduit-neck leading from said opening and adapted to convey glass thereto from a tank, a furnace arranged to apply heat to the exterior of the pot, a pair of pier walls straddling said conduit neck and supporting the sides of the pot, and a pier "disposed under the conduit-neck, combined substantially as set forth. I

3. Glass-drawing apparatus comprising, a furnace, a pot disposed therein and having its top substantially level with the top of the furnace wall, a conduit neck for supplyingthe pot with glass, and removable segmental plates resting on the furnace and pot-walls inclosing the top of the furnace, combined substantially as set forth.

4. Glass-drawing apparatus comprising, a furnace, a pot disposed therein and having its top substantially level with the top of l fmental plates resting on the furnace and potwalls inclosin g the top of the furnace and having their inner ends rabbeted to the wall of the pot, combined substantially as set forth. I u v Glass-drawing apparatus comprising, a furnace,'a pot disposed therein and having its top substantially level with the top of the furnace wall, a conduit neckfor supplying the pot with glass, and removable segmental plates resting on the furnace and pot walls inclosing the topof the furnace, the

adjoining edges of said plates being tongued and grooved together, comblned substane I tially as set forth. 7 b

6. Glass-drawing apparatus comprising, a furnace having a discharge port in its floor, a pot disposed therein and having its top substantially level with the top of the furnace wall, a conduit neck for supplying the pot with glass, a segmental series of plates resting on the top of the walls of the pot and furnace and closing the top of the furnace, one of said plates being disposed substantially over said port and having its inner portion engaging and closing a notch in the top of the wall of the pot, combined substantially as set forth.

7. In glass-drawing apparatus, a bait having an annular recess formed therein, and a burner carried by the bait discharging downwardly into the recess therein.

8. Glass-drawing apparatus comprising a furnace having a discharge port in its floor, v

moval of the pot.

10. Glass-drawing apparatus comprisinga furnace having a dlscharge port in its floor, a pot disposed within the furnace having its top substantially level with -the top of the furnace wall, a conduit for supplying the pot with glass, and a segmental series of plates resting on the top of the walls of the pot and the furnace, closing the top of the furnace.

11. In glass-drawing apparatus, a shallow .pot adapted to contain the glass to be drawn,

the floor of said pot being provided with an elevated annular ridge and with a symmetrically disposed inlet opening therein.

12. In glass-drawing apparatus, a shallow pot adapted to contain the glass to be drawn, the floor of said pot being provided with a symmetrically disposed inlet opening therein and with an elevated annular ridge, surrounding said opening and a furnace arranged to supply heat to the exterior of the p 13. In glass-drawing apparatus, a hood, a bait carried by the rim thereof, said bait having a downwardly extending annular recess formed therein, and an annular gas burner discharging downwardly into the recess aforesaid.

14. In glass drawing apparatus, a shallow pot'of a greaterdepth near the edge portion thereof, said p'ot adapted to contain the glass to be drawn and having a symmetrically disposed opening in the floor thereof, and a conduit neck leading from said openingkadapted to convey glass thereto from a tan a 15. In glass drawing apparatus, a shallow pot of greater depth near the edge portion thereof, said pot adapted to contain the glass to be drawn and having a symmetrically disposed opening in the floor thereof, a conduit neck leading from said opening and adapted to convey glass thereto from a tank, and a furnace arranged to apply heat to said pot.

.LEOPOLD .-MAMBOU G. ULGISSE HOUZE. Witnesses:

IRVIN YOUNG, HENRY W. JENNINGS; 

